Think of it this way:
Write the procedures and instructions that work for you and the entire company. If all requirements are in one document, so be it. It is up to you to design your system to make it work with the current and future employment base you have and will hire.
Are there minimum requirements, of course, but don't let them limit your thinking.
As an example, in a QS system I was involved with we had 5 procedures for 4.15, because there were 5 sections. They could have been covered by one procedure and additional instructions as needed.
At the time it seemed a good way to go. At another company it might be the wrong way to go.
I guess to wrap it up, let your mind do the work and not the requirements. There are what, 20,000 companies that are registered to a system, and believe me, they do not all do it the same way.
Sure I've been away for awhile, but I feel much better now!